A couple of things. First, Sleek has their Kleer Wireless set, which I believe works with the SA6 if you wanted to go the wireless route.
Secondly, try running the cable under your shirt. I wear two shirts, and run the cable between my hoodie/t-shirt and my undershirt. This is completely eliminated cable snags for me. I think a long cable is going to make things worse... more cable to catch on things. I'm 6' and the 46" cable on my TF10 is just about the perfect length to run from my ear down to my pocket. Sometimes if I'm wearing basketball shorts or something with deeper pockets, I wish it was maybe an inch longer. It also comes with an 18" extension (which does NOT affect sound quality), but that is typically too long except for home use. I'm not sure how tall you are that you think you need a 6 foot cable.
Finally, I know accidents happen but I would consider dropping your Touch less if it's happening enough to damage your cable. One day you're going to ruin your mp3 player as well.